Reuters says: A coalition of major Christian churches including the Vatican launched a rule book on Tuesday for spreading their faith that aims to reduce hostility from Islam and other religions to efforts to convert their followers.
The World Council of Churches says: Christians reach broad consensus on appropriate missionary conduct.
The second sounds both more plausible and less aggressive – but that's journalism for you!
The word that first jumps out is "respect" – self, mutual and solidarity. Also respect for the process of conversion (which can be lengthy and complex). Now a bad list of suggestions.